// 根据屏幕分辨率判断使用@2x图片或者@3x图片
.bg-image(@url) {
    background-image :url("@{url}@2x.png");

    @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) {
        background-image :url("@{url}@3x.png");
    }

}
.bg-1(){
    background:linear-gradient(66deg,rgba(232,48,56,1),rgba(247,88,151,1));
}
.bg-2(){
    background:linear-gradient(-90deg,rgba(232,48,56,1) 0%,rgba(254,114,123,1) 100%);
}